Merge pull request #2880 from abays/add_ovs_stats_bonds_3

ovs_stats bonds support with separate interface stats

src/collectd.conf.pod

@@ -6274,6 +6274,7 @@ B<Synopsis:>
    Address "127.0.0.1"
    Socket "/var/run/openvswitch/db.sock"
    Bridges "br0" "br_ext"
+   InterfaceStats false
  </Plugin>
 
 The plugin provides the following configuration options:
@@ -6307,6 +6308,13 @@ omitted or is empty then all OVS bridges will be monitored.
 
 Default: empty (monitor all bridges)
 
+=item B<InterfaceStats> B<false>|B<true>
+
+Indicates that the plugin should gather statistics for individual interfaces
+in addition to ports.  This can be useful when monitoring an OVS setup with
+bond ports, where you might wish to know individual statistics for the
+interfaces included in the bonds.  Defaults to B<false>.
+
 =back
 
 =head2 Plugin C<pcie_errors>